Communication system between a mobile phone and a telephone/data switching system which allows the mobile phone to be an extension of this telephone/data switching system

ABSTRACT

The present invention refers to a communication system between a mobile phone and a PABX, which allows any programmable mobile phone to work as a PABX extension, being the PABX responsible for answering, making and transferring phone calls, as well as detection, identification and integration of mobile phones, and also a PABX installed software which allows to perform those functions.

The scope of the present invention is inserted in the telecommunicationdomain and refers in particular to a communication system between amobile phone and a telephone/data switching system, which allows themobile phone to be an extension of this telephone/data switching system.

BACKGROUND OF THE INVENTION

The increase of telecommunication traffic made it necessary to improvethe switching capacity of PABX. However, with the present state-of-art,PABX only has fixed extensions or DECT, PHS technology or equivalent.PABX does not have extensions, which use, as a transmission line, otherwireless telecommunication networks. Thus, according to the previousstate-of-art, a PABX is established as following:

-   -   CPU, Central Processing Unit with RAM and ROM    -   Power supply with or without external battery    -   Electric current stabilizer with protection against variations    -   Digital switching matrix (anti-blocking or not anti-blocking;        TDM or IP)    -   Network circuits        -   ISDN Basic Rate Interface (BRI) access        -   ISDN Primary Rate Interface (PRI) access        -   xDSL access        -   Internet Protocol (IP) access        -   DTMF analogue access        -   Decadic analogue access        -   20 PPS analogue access    -   Other system interface circuits        -   E&M analogue interface        -   QSIG digital interface        -   Proprietary digital interface    -   Extension circuits        -   Decadic analogue extension circuits        -   20 PPS analogue extension circuits        -   DTMF analogue extension circuits        -   ISDN Basic Rate Interface (BRI) extension circuits        -   Proprietary digital extension circuits        -   DECT/PHS wireless extension circuits    -   Emergency circuits    -   Remote diagnostic and remote programming systems    -   DTMF generator and detector and suspension music    -   Extensions direct access circuits and remote control module    -   C.T.I. supporting circuits    -   Extern commands optional package, door-phone and others

Note: PABX can have access to radio communications, through the networkcircuits, just by connecting to the network circuit through atransmitter according the specific technical characteristics.

PABX services, features and characteristics, which were used in theprevious technique, are listed below:

-   -   Personal programming ability    -   Ability to answer and transfer any phone call to any extension    -   Ability to make outside phone calls from any extension    -   Extension ability to communicate between each other    -   Phone calls routing and redirecting system    -   voice mail services    -   Computer and telephone system integration    -   Remote support, remote programming and remote diagnostic    -   Specific functions for organizations, business companies,        hotels, call centres and telemarketing    -   Traffic statistic analysis    -   Messages broadcast    -   Phone calls restraint    -   Access codes    -   Multiple class of service    -   Caller identification    -   Informative messages    -   Phone calls pre-answer    -   Available services at analogue and ISDN public switching network

At the present time, a PABX, which has, telephone networks integrationand connection to other system, has also extensions (analogue ordigital), which do not use as a transmission line any other system.However this invention uses an independent radio system between PABX andthe mobile phone as a transmission line. This independent radio systemcan be GSM, UMTS, satellite, TDMA, CDMA, AMPS, NAMPS, ETACS or any otherkind radio transmission.

Surprisingly, the inventor noticed that it was possible to establish acommunication system between a mobile phone and a PABX, which allows anyprogrammable mobile phone to work as a PABX extension with the resort ofPABX software, and made the invention communication system.

At the eighties, there were systems which allowed the connection to thePABX with DISA software, even through analogue lines, and with therecourse to the DTMF for sending commands and line signal detection toallow the communication disconnect identification. In publication US2002/00192646 it is described a system which includes an intermediateunit (stated as wireless communication unit), IU, and a PABX. This unitallows any wired or wireless telephone to connect to the PABX, since theIU makes the connection between the PSTN and the PABX via a PRI circuit.However, the PRI circuit does not allow all kinds of signalling that thePABX offers and receives from fixed extensions. This invention exceedsthis limitation, by introducing a transmitter into the PABX. The PABXand its components will be fully responsible for the integration. Asalso stated in the previous publication, the integration uses the PSTNbetween the mobile extension and the PABX, which brings disadvantages incosts of the exploited system. Our invention improves it, allowing thetransmission line to be a circuit of the mobile network of the mobilephone, making the connection one-network oriented. As stated, allcomponents of the intermediate unit (IU) are present in the PABX (CPU,receiving and transmitting circuits and a database). The intermediatemachine will have to be configured with the same database that a PABXhas, concerning the users restriction and permission tables, as well asreceiving and transmitting the signalling, which a fixed PABX extensionrequires. Thus, problems as inconsistency of both PABX and intermediateunit databases can occur. Long delays can happen in the processing oftwo machines in one communication. Huge costs in the investment andmaintenance of two systems with redundant components and spreading ofinformation (the mobile phone extension data in IU database and fixedextension data in database). Either this data redundancy, or signallinglimitations, as well as enormous disadvantages in costs with phone callsin business media, can be solved with our invention that uses one onlynetwork in communication and reversible circuits. These circuits makethe identification of the mobile extension and switch from trunk circuitto extension circuit as the integration is allowed by the PABX CPU.

There are no use of any type of server components, nor the existence ofany messages exchange between the systems that do not exist in a normalcommunication system between the fixed extension and the PABX. The fixednetwork dependence is null, as only the radio communication system isused, without any special programming in the mobile network operator,which makes this invention a key of a better and cheaper businesscommunication.

DETAILED DESCRIPTION OF THE INVENTION

The present invention refers to a communication system between a mobilephone and a PABX, which allows any programmable mobile phone to work asa PABX extension. The PABX execute the answer, making and transfer callfunctions, as well as detection, identification and integration ofmobile phones. Mobile phones also have access to PABX software, whichallows these functions development.

Attached, schematic figures for better comprehension of thiscommunication system are presented, wherein:

FIG. 1 represents a PABX invention scheme.

FIG. 2 represents the closest prior art PABX circuits, interface andaccess scheme.

FIG. 3 illustrates the invention communication system functioningprinciple.

FIG. 4 shows the diagram in case of a phone call PABX reception comingdirectly from the exterior.

FIG. 5 shows the diagram in case of a phone call made through the mobilephone.

FIG. 6 shows the diagram in case of a PABX transfer call to a mobilephone.

From now on, the following features of this invention communicationsystem will be described in detail using abbreviations defined at theend of the Description: the constitutive elements, the necessaryconditions of each constitutive element, the electronic circuits used inthe making of this invention, the functions made by this inventionsystem and the functioning principle.

3.1. Constitutive Elements

The constitutive elements are described below;

3.1.1. PABX

A PABX has the numbers of mobile and fixed telephone network circuits,mobile and fixed telephone networks extensions according to the specificneeds. The mobile transmitter circuit integrated in the PABX must becompatible with the mobile phone configuration.

3.1.2. Transmission Line

The transmission line must be compatible with mobile extensionconfiguration. This transmission line can be a point-to-point radiocircuit, a trunking radio net, GSM, UMTS, TDMA, CDMA, AMPS, NAMPS,ETACS, satellite or any kind of radio communication. The transmissionline must be compatible with the mobile phone configuration. Accordingto the mobile phone, it is possible to choose the transmission line andthe transmitter used in PABX.

3.1.3. Mobile Phone

The mobile phone can be known as cell phone, radiophone, satellitephone, mobile extension or cell extension. In this project when weintroduce mobile phone we refer to any of these names.

The mobile phone is chosen according to the local and communicationdemands. The mobile phone can be any which work with GSM, UMTS, TDMA,CDMA, AMPS, NAMPS, ETACS or any other cell network, satellite or anyother radio communication.

Any kind of mobile phone is compatible by changing PABX transmittermodule according to the mobile phone used.

3.2. Constitutive Elements Obligatory Conditions

3.2.1. PABX

3.2.1.1. The number of network lines must be according to the requiredmobile and fixed telephone networks direct access.

3.2.1.2. The number of internal extension must be according to thespecific needs.

3.2.1.3. The number of PABX transmitters must be according to the mobileextensions needed for simultaneous communication. PABX transmitterscharacteristics must be according to the chosen mobile phonecharacteristics. PABX can have any kind of transmitters, with differentcharacteristics, since it has connected mobile phones with differentcharacteristics. In other words, it can have at the same time differentmobile extensions like GSM, UMTS, TDMA, CDMA, AMPS, NAMPS, ETACS,satellite and any kind of radio communicators.

3.2.1.4. Detection circuits to identify mobile phones after thecommunication establishment. These circuits are both able to identifythe caller before the audio communication is established, and after thecommunication is established, they can receive an identification code.

3.2.1.4.1. Detection made by identifying the mobile phone caller. PABXhas this service available only for the mobile network technology, whichalso has this service.

3.2.1.4.2 Detection made by a code sent by the mobile phone after theaudio communication establishment. The PABX has this service to identifythose mobile extensions whose technology does not support calleridentification before answering. These detectors are also available toenforce security even if the technology is able to send a mobile phonecaller identification. Those detectors are frequently DTMF detectors,however they can use any other kind of transmission signalling.

3.2.1.5. CPU

PABX has a CPU where proper software to the following functionsdevelopment is located: answering and making phone calls, transferring,specific functions, detection, identification and mobile phoneintegration.

3.2.1.6. Power Supply Circuits

PABX has the required power supply circuits to feed all its componentsand peripheral devices.

3.2.2. Transmission Line

Transmission line means the communication means used to established thecommunication between PABX and the mobile extension. There are severaltypes of transmission line according to the mobile phone.

The only item required is the compatibility between the mobile phone andthe PABX transmitter. The transmission line can be any of the followingsystems; GSM, UMTS, TDMA, CDMA, AMPS, NAMPS, ETACS, satellite, specificradio frequency transmission or any other kind of radio transmission.

3.2.3. Mobile Phone

Any mobile phone can work as a PABX mobile extension. The only itemrequired is the agreement between the mobile phone and the PABXtransmission characteristics and the existent transmission line.

3.3. Electronic Systems Used in the Embodiments of the Invention

This invention is based on the principle from now on described, withdifferent power supply circuits, network and extension packages,processing unit, etc. Thus, in this invention we are not interested inthe electronic circuits but in their integration with the detectors,identifier systems, transmission line and proper software to the mobileextension.

-   -   PABX power supply circuit    -   PABX CPU with proper software and mobile extension        identification detector    -   Analogue internal extension package    -   Digital internal extension package    -   Convertible ISDN internal extension package for each gate        through ISDN basic access circuits programming    -   Convertible PRI ISDN package through E1, T1 and QSIG programming    -   Decadic system analogue network package convertible to DTMF    -   IP package with IP access    -   Cell system transmitters and antennas. These elements can be        GSM, UMTS, TDMA, CDMA, AMPS, NAMPS, ETACS, satellite, specific        radio frequency transmission systems or any other kind of radio        transmission system.

The present invention can be either integrated in a PABX or built in anindependent cabinet and connected with an existent PABX. In this case,the independent cabinet should have all the circuits, which precedesthis invention beginning with transmitters, identifiers circuits, aswell as coupling circuits between the cabinet, which contains thisinvention, and a PABX. This coupling can be either done through the PABXextension, junction or network circuits (even through IP network) orconnecting directly through the CPU. Here not all coupling ways will bedescribed, since they are reachable by any technician who entirelyunderstands this invention's previous technology.

3—4 Invention System Function

3.4.1. Function of Mobile Phone as an Extension

This function allows a mobile phone to receive phone calls from a PABXas well as to access to all PABX function variety as if it was aninternal extension, though being able to use other system astransmission line. One advantage is that the functioning cover is thatone permitted by the transmission line between PABX and the mobilephone.

The transmission line used can be the own cell network (such as GSM orother system), satellite or through radio communication between PABX andthe mobile phone. The mobile phone and the transmitter/receptor PABXwill be chosen according to the transmission line.

A mobile phone can be programmed as an extension of one or more PABX.

3.4.2. Phone Calls Transfer

3.4.2.1. Concerning external phone calls transfer, received or made bythe PABX.

The PABX extension mobile phone function allows a mobile phone toreceive by transfer any phone call coming from its own PABX. Thus,making or receiving an external phone call, any internal extension orPABX operator is able to suspend the phone call and transfer it to themobile phone. That phone call can be made to or coming from fixed andmobile access networks.

Procedure:

When an internal extension is communicating with the exterior:

-   1—Press the hold-on button-   2—Dial the mobile phone extension number-   3—It is able to disconnect and the communication will be    automatically transferred to the mobile phone.

Note: this procedure can be made differently according to the phonemodel, which transfers the phone call.

3.4.2.2. Concerning internal phone calls transfer, received or made byPABX.

Any extension, which receives a phone call from a fixed extension orfrom an extension mobile phone, is able to suspend and transfer it toany other extension phone call from the system. In case a fixedextension made by that phone call to another fixed extension or to anextension mobile phone, the proceeding extension is able to suspend andtransfer that phone call to any extension mobile phone.

Procedure:

When an internal extension is communicating with other internalextension or with an extension mobile phone:

-   1—Press the hold-on button-   2—dial the mobile phone extension number-   3—it is able to disconnect and the communication will be    automatically transferred to the mobile phone.

Note: this procedure can be made differently according to the phonemodel, which transfers the phone call.

3.4.2.3. Concerning an internal or external phone call transfer,received or made by the mobile phone extension.

Mobile phone extensions are able to suspend the received or made phonecalls (internal or external), to dial a code, which holds, and thentransfer it not only to any internal extension but also to other mobilephone extension or to the exterior.

Procedure:

When the mobile phone extension is communicating:

-   1—dial the hold code-   2—dial the number which will receive the phone call-   3—it is able to disconnect and the communication will be    automatically transferred to the mobile phone.

Note: this procedure can be made differently according to the mobilephone model, which transfers the phone call. In other words, instead ofdialling the hold-on code, the mobile phone model may have apre-memorized hold code button. If that mobile phone model does not sendany signal during the communication, it is not able to transfer phonecalls. However, that mobile phone is able to send or to receive anyphone call and it has access to the other PABX services.

3.4.3. Phone Calls Made by Mobile Phone Extension

Whenever the mobile phone extension is asked to make a phone call, adigit is pressed and a communication with PABX is established (this canhappen through a restricted users group if the transmission line is acell network). Since the communication has been established, the mobilephone extension will automatically send an identification code, whichwill be processed by the CPU. From this point, the PABX is able tointegrate the mobile phone extension, and this last one is logicallyconnected to the PABX as an internal extension. The mobile phoneextension is now able to dial an internal number if the communication isinternal to the PABX, or to dial an external number if the communicationis to the exterior, to the fixed or mobile access networks. If a phonecall is made in these conditions the communications are established bythe PABX available access networks. In case the PABX is equipped with asmart system to trace the least cost route, the given access networkline and the operator will be the most suitable. Calls made by themobile phone extension can be made by the PABX through the fixed accessnetwork or through the mobile access network circuits or others if thePABX is so equipped.

This invention is also able to perform other services as combined withprevious functions, normally existent in PABX. That is the case of callback function, which being associated with this invention, buildsanother service. Thus, if PABX configures the call back function, as themobile phone is identified, instead of receiving the PABX condition tobe able to dial, the PABX disconnects and processes call back, which isto explain that the PABX establishes a connection through the PABX tothe mobile phone. In this case, it is the PABX, which establishes thecommunication to the mobile phone through the transmission line betweenboth elements, and non-inversely, which in some circumstances can becost effective. Associating the call back function with this invention,the PABX is the one that returns the communication to the mobile phone,giving to the mobile phone the possibility to communicate to anylocation. The call back function, which until now was used by PABX, forinternal services, and by telephone operators to switch tariffs, is now,with the present invention, applied to mobile transmission linesbelonging to autonomous systems. With the present invention, the callback function builds another service.

Procedure;

-   1—press a mobile phone digit (this digit can have a number or    command memory in order to establish a transmission line to the PABX    and must have the identification code).    or    -   in case there is not a memory available at the mobile phone for        this effect a number/command and the identification code must be        dialled manually.        or    -   in case the mobile phone has the software which allows a        determined beforehand prefix and pause, the user only needs to        dial the final destiny call number, since the mobile phone will        automatically do the procedure 1, 2 and 3,-   2—once the transmission line is established the mobile phone is    informed that it is integrated into the system, it can also be done    by a voice signal: “you are integrated into the sytem”-   3—the mobile phone is able to dial an internal or external number    according to the intended phone call. Then the phone call will be    established.

3.4.4. Phone Calls Received by the Mobile Phone Extension

The phone calls can be received by five different ways;

-   -   directly from the exterior through the mobile phone number (in        case the mobile phone extension is integrated into a public        mobile access network)    -   directly from the exterior through the number of the PABX with        the number of the mobile phone extension added    -   through the PABX answering and the followed transfer to the        mobile phone    -   directly from a fixed internal extension or other mobile phone        extension    -   directly from the exterior through a DDI as like as any other        fixed PABX extension

3.4.4.1. Phone Calls Directly Received from the Exterior Through aMobile Phone Number (in Case the Mobile Phone Extension is a Public CellAccess Network)

If the mobile phone extension is able to receive direct calls from thepublic cell access network or satellite, it is also able to receive anydirect phone call without needing to pass through the PABX. In thiscase, the mobile phone extension has an internal number but also apublic phone number.

Procedure:

Any mobile or fixed public access network telephone, which wants tocommunicate with a mobile phone extension, must proceed the followingway:

-   1—dial the mobile phone extension public number (including area code    if required) and then the phone call will be established as it    happens in other ordinary phone.

3.4.9.2. Phone calls directly received from the exterior through a PABXnumber with the mobile phone extension number added.

The PABX can have fixed or mobile access network lines aimed toautomatically answer phone calls and forward them to the extension. Thisway, any public phone can call these numbers where an automatic answerwill be processed and then dial the wanted extension number.

Procedure;

People who intend to connect the extension mobile phone this way mustknow the PABX line number, which is used to process automatic answering,and the extension mobile phone number.

-   1—dial the PABX line number which is used process automatic    answering (since the connection is established it is possible to    hear “please dial the extension number”).-   2—Dial the mobile phone extension number and the mobile phone will    automatically ring.

3.4.4—3. Phone calls received with a PABX answering service andposterior transfer to the mobile phone.

As shown in 1.2.1. (concerning external phone calls transfer, receivedor made by the PABX).

3.4.4.4. Directly received phone calls from a fixed internal extensionor from other extension mobile phone.

Any fixed or mobile extension is able to communicate with the extensionmobile phone. Dialling the number is the only thing that is necessary.

Procedure:

-   1-dialling the extension number

3.5. Invention Communication System Applications

There is a variety of applications of this mobile phone extensioninvention. The applications can be in business companies, hotels, publicservices, and private residences, etc.

A PABX can be used everywhere, also the mobile phone extension can be auseful service.

Mobile extensions are able to receive or make phone calls through thePABX. Hence, if the PABX has fixed and mobile access networks frommultiple operator, the mobile extension is able to make any phone callthrough the destiny operator avoiding the need of having an operatormaking the connection between different networks.

At the phone calls reception, the extension mobile phone is also able toreceive any kind of communication transferred through the PABX,independently of the operator source. In this case it is alsounnecessary an operator for the interface between multiple operators,since the PABX avoids it.

The extension mobile phone only has the services allowed by the PABX.Thus, each mobile extension is able to have a personalized programmingwhich will authorize in a selective way to make only internal, localeregional, national, international phone calls, or to other mobilenetworks, or to specific numbers.

With the mobile extension service any PABX is able to make complete andintegrated management of all extensions either fixed or mobile phones.

Any extension mobile phone can have a double service of being anextension of a PABX but also have a direct network to make and receivephone calls, regarding the necessary services.

A mobile phone can also be programmed as an extension of one or morePABX. In this case, it is possible to choose the PABX which will do therequested phone call.

3.6 Functioning Principle

The functioning principle is based on the following items:

3.6.1. When a mobile phone receives a PABX phone call.

In this situation, when a PABX connects or transfers a phone call to themobile phone, it is the PABX that dials the mobile extension number.Thus, the identification of the relative mobile extension with thenumber is automatically done. This way the PABX connects to the mobilephone, transfers the phone call as well as the CPU is informed aboutthis situation. The CPU, rendering this way the system integration,automatically does the mobile extension allocation to the PABX extensioncircuit. Therefore, after receiving a phone call, the mobile phone willhave an integrated communication circuit with the PABX as if it was afixed internal extension. The only difference is the differenttransmission line used.

3.6.2. When the mobile phone makes a phone call.

Previously, the mobile phone establishes a communication with the PABX.The PABX has receiving circuits of that communication prepared toidentify the caller before establishing the audio connection, or afterestablishing the audio connection and receiving a caller identificationcode. That code can be a DTMF signal or others. As the CPU is informedabout the caller identification, the mobile extension acknowledgmentwith the corresponding number is done. The CPU will automaticallyallocate that transmission line with the mobile extension from thebelonging extension circuit, since the PABX has a relation between theextension number and the identification number.

By this way the mobile extension is connected to the PABX extensioncircuit as it happens with any fixed extension. The only difference isthat the fixed phone is permanently connected to the PABX, while themobile phone extension is connected after the communication isestablished and the mobile phone is identified.

In this project the integration's moment happens when the mobile phoneallocation to the PABX extension circuit is done, after thecommunication is established and the mobile phone identification.

After the integration the mobile phone is able to make phone calls andhave access to the PABX services as any internal extension, having theauthorized PABX permissions to that extension.

Summarizing, whenever the mobile phone is receiving or making a phonecall, a previously communication with the PABX is established. The PABXidentifies that mobile phone and makes the integration. Once theintegration is done, the mobile phone will work as any PABX fixedextension and submitted to a personalized programming according with theextension number.

4 Final Note

This invention provides a communication system wherein a PABX is able tomanage fixed and mobile phones in its extensions. Hence, the mobile andfixed phones are able to be totally traffic controlled by the PABXsoftware, when making or receiving any connection. The PABX software isalso included in the scope of the invention. The invention is based inthe PABX integration with the mobile phone by using the proper softwareand identification detectors.

The description was made with help of specific implementation formulas,which should not be considered as restrictive but illustrative, beingthe ambit defined by the attached claims.

ABBREVIATION DEFINITION

-   PAMX—Private Automatic Branch Exchange-   CPU—Central Processing Unit-   RAM—Random Access Memory-   ROM—Read-Only Memory-   ISDN—Integrated Services Digital Network-   BRI—Basic Rate Interface, ISDN access, 2B+D (channels: 2×64 kbp+16    kbps)-   PRI—Primary Rate Interface, ISDN access. In the USA, 23B+D    (channels: 23×64 kbps+64 kbps); in Europe, 30B+D (channels: 30×64    kbps+64 kbps)-   DTMF—Dual-Tone Multifrequency-   DISA—Direct Inward System Access-   DECT—Digital Enhanced Cordless Telecommunications-   PHS—Personal Handyphone System-   xDSL—Digital Subscriber Line—family of DSL technologies. The “x” in    xDSL stands for any number of letters denoting the xDSL family    members such as asymmetric DSL (ADSL), high-bit-rate DSL (HDSL),    ISDN DSL (IDSL), single-pair symmetrical services DSL (SDSL), very    high-data-rate DSL (VDSL)-   IP—Internet Protocol-   LAN—Local Area Network-   DDI—Direct Dialing In-   E&M—Ear (Receive) and Mouth (Transmit)-   QSIG—Q SIGnalling-   C.T.I.—Computer Telephony Integration-   GSM—Group Special Mobile (Global System for Mobile Communications)-   UMTS—Universal Mobile Telecommunications System-   TDMA—Time Division Multiple Access-   CDMA—Code Division Multiple Access-   AMPS—Advanced Mobile Phone Service-   NAMPS—Narrow AMPS-   ETACS—Extended Total Access Communication System

1. A communication system between a mobile phone and a PABX,characterized in that it allows any programmable mobile phone to connectand communicate as a PABX extension, making and receiving phone calls,as well as accessing all services of the referred PABX, as an internalextension of the referred PABX, with the referred PABX communicatingwith the referred mobile phone directly through the mobile network, thecommunication's transmission line between the referred mobile phone andthe referred PABX is established by accessing mobile networks andwithout needing to access fixed networks of the following type: PSTN,ISDN, IP or direct lines.
 2. System according to claim 1, characterizedin that the communication's transmission line between a mobile phone anda PABX is a cellular oriented communication like GSM, UMTS, TDMA, CDMA,AMPS, NAMPS, ETACS and others.
 3. System according to claim 1,characterized in that the communication's transmission line between amobile phone and a PABX is a satellite communication.
 4. Systemaccording to claim 1, characterized in that the communication'stransmission line between a mobile phone and a PABX is a radiocommunication, trunking, UHF, VHF and other frequencies allowed by eachcountry's law.
 5. System according to the previous claims 1 to 4,characterized in that it allows transferring calls received by PABXeither from fixed or from mobile telephone networks.
 6. System accordingto claims 1 to 4, characterized in that it allows the transfer of phonecalls made from PABX either from fixed or from mobile telephonenetworks.
 7. System according to claim 1, characterized in that itallows the mobile phone to have also access to PABX authorized services.8. System according to claim 1, characterized in that it comprises aPABX, a programmable mobile phone compatible with the PABX installedtransmitter and a transmission line also compatible with the PABXinstalled transmitter.
 9. System according to claim 8, characterized inthat the PABX has fixed and mobile network circuits and fixed and mobileextension circuits.
 10. System according to claim 8, characterized inthat the PABX has one or more transmitters as GSM, UMTS, TDMA, CDMA,AMPS, NAMPS, ETACS, or a transmission by satellite, or a differentfrequency transmitters according to the country's law at the moment ofcommunication.
 11. System according to claim 8, characterized in thatthe mobile phone is compatible with the PABX installed transmitter, asGSM, UMTS, TDMA, CDMA, AMPS, NAMPS, ETACS, or a transmission bysatellite, or other, according to the PABX installed system.
 12. Systemaccording to claim 8, characterized in that the transmission line iscompatible with the PABX installed transmitter, thus, comprising a GSM,UMTS, TDMA, CDMA, AMPS, NAMPS or ETACS transmitter or a satellitetransmitter, or others, according to the PABX installed system. 13.System according to claim 10, characterized in that the PABX comprisesdetection circuits to identify the mobile phone after the communicationestablishment.
 14. System according to claim 13, characterized in thatthe mentioned identification is made by a code sent through the mobilephone.
 15. System according to claim 13, characterized in that thementioned identification is done automatically.
 16. System according toclaims 10 to 15, characterized in that it allows the referenced mobilephone to be recognized by more than one PABX.
 17. System according toclaim 10, characterized in that the PABX comprises a central processingunit, CPU, which has a system functions developed software, namelyanswering, making and transferring phone calls, and detecting,identifying and integrating mobile phones.
 18. PABX, which comprises thesystem according to claim
 1. 19. PABX according to claim 18,characterized in that its installed reversible package is able, at anytime of work, by CPU orders, to switch the network function withextension.
 20. Software integrated in the PABX CPU according to claim18, characterized in that it allows the system function development,namely answering, making and transferring phone calls, and detecting,identifying and integrating mobile phones.
 21. Software according toclaim 20, characterized in that it allows to control the mobile phoneidentification through system detectors and after making thatidentification, to charge that mobile phone with an extension numberwhich corresponds to the mobile phone identification in the CPU memory.22. Software according to claims 20 to 21, characterized in that it iscapable to order a PABX reversible package so that the communicationchannel which is being used by the mobile phone, switch from network toextension.
 23. Software according to claim 20, characterized in that itis capable to program vary logical extension number according to theexistent mobile phone numbers.
 24. Software according to claim 20,characterized in that it is capable to charge, bound PABX accesses orservices to mobile phone extensions as PABX proceeds with fixedextensions.
 25. Software integrated in the PABX CPU according to claim20, characterized in that the function procedure of answering, makingand transferring phone calls from PABX to a mobile phone, is done asdescribed in the attached Figures.